package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Transactional         // 多表查询用的：要么全成功要么全失败
    @Override
    public void savewithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //向菜品表插入数据
        dishMapper.insert(dish);
        //获得insert成功后的主键id
        Long id = dish.getId();
        //向口味表插入数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(id));
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品的批量删除
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //1.查看ids中是否包含起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus()== StatusConstant.ENABLE){
                //起售中不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //2.查看是否被套餐关联了
        List<Long> setmealIds = setmealDishMapper.getsetmealIdsByDishId(ids);
        if (setmealIds!=null&&setmealIds.size()!=0){
            //菜品被套餐关联
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //3.删除菜品数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //4.删除菜品关联的口味数据
//            dishFlavorMapper.deleteBydishId(id);
//        }
        //删除优化：批量删除 减少sql语句数量
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteBydishIds(ids);
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //查菜品
        Dish dish = dishMapper.getById(id);
        //查口味
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    @Transactional
    public void updatewithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);

        dishFlavorMapper.deleteBydishId(dishDTO.getId());
        if (dishDTO.getFlavors()!=null&&dishDTO.getFlavors().size()>0){
            dishDTO.getFlavors().forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));
            dishFlavorMapper.insertBatch(dishDTO.getFlavors());
        }
    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish=Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();
        List<Dish> list=dishMapper.selectByCategoryId(dish);
        return list;
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.selectByCategoryId(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrstop(int status, Long id) {
        dishMapper.updateStatus(status,id);
    }
}
